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| Bore (d) | 12 mm |
|---|---|
| Outer (D) | 24 mm |
| Width (B) | 6 mm |
| Weight (g) | 11 g |
| Dynamic(C) | 295 kgf |
| Static(Co) | 150 kgf |
Table of content
1. E-Bike Bearings - Introduction to 6901 Bearings
The 6901 bearing is a common bearing model widely used in industries such as bicycles, electric bicycles, automobiles, and household appliances. It belongs to the most extensively used category of bearings in the mechanical industry. In this article, we will delve into the dimensions of the 6901 bearing.
| Bore (d) | 12 mm |
|---|---|
| Outer (D) | 24 mm |
| Width (B) | 6 mm |
| Weight (g) | 11 g |
| Dynamic(C) | 295 kgf |
| Static(Co) | 150 kgf |
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A. Inner diameter of the 6901 bearings
The inner diameter of the 6901 bearing is 12 millimeters. It can accommodate shafts with a diameter of 12 millimeters.
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B. Outer diameter of the 6901 bearings
The outer diameter of the 6901 bearing is 24 millimeters. This refers to the diameter of the outer ring of the bearing. Make sure that your application space can accommodate the outer diameter of the 6901 bearings.
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C. Width diameter of the 6901 bearings
The width of the 6901 bearing is 6 millimeters. This refers to the distance between the inner and outer rings of the bearing. Ensure that this dimension is suitable for your application to ensure proper installation and operation.
6901 Detailed Dimension Information 
The 6901 bearing is a common and widely used bearing model. Understanding its inner diameter, outer diameter, and width dimensions is crucial for selecting the appropriate bearing. Based on your application requirements, load, speed, temperature, and quality criteria, choose the suitable size of the 6901 bearings for your application to ensure good performance and reliability.
The 6901 bearing is typically composed of an inner ring, an outer ring, ball bearings, and a cage (also known as a retainer). The groove on the raceway is slightly larger than the radius of the steel balls. As the balls and raceway make point contact, the bearing can withstand both bi-directional axial loads and radial loads. It is commonly used in pairs under normal circumstances to reduce the internal axial forces caused by the load and to handle radial loads.
The sealing covers for the 6901 bearing mainly come in three types: ZZ, 2RS, and OPEN.
The 6901 OPEN type bearing cover is a design without a cover, allowing the internal components of the bearing to be exposed to the external environment. This design makes the bearing more susceptible to contamination from dirt, dust, and other external particles. Therefore, the 6901 OPEN type bearing is more suitable for applications in clean environments or where regular cleaning is required.
6901 ZZ refers to the 6901 bearing with metal shields as the outer cover. The metal shields effectively block dust, contaminants, and other external particles from entering while retaining the lubricant within the bearing.
6901 2RS refers to the 6901 bearing with rubber seals as the outer cover. The rubber seals provide enhanced protection by effectively blocking moisture, dust, and other contaminants from entering. This sealing method is commonly used in harsh environments and applications that require stricter protection.
When choosing the appropriate bearing outer cover mode for your needs, consider the following factors
Application environment: Determine the potential sources of contamination and other external particles in your application environment. Based on the environmental conditions, choose between open type, metal shields, or rubber seals to provide the appropriate protection.
Precision and speed requirements: Consider the precision and speed requirements of your application. Open type bearings are typically suitable for low precision and lower speed applications, while metal shields and rubber seals offer higher protection and are suitable for medium and high precision requirements.
Maintenance requirements: Consider your maintenance needs for the bearings. Open type bearings require regular cleaning and lubrication, while metal shields and rubber seals can reduce maintenance requirements.
In some components of automobiles, such as transmissions and generators, the 6901 bearing is also utilized.
Certain components in household appliances, such as fans, motors, and compressors, can also utilize the 6901 bearing.
The 6901 bearing is a crucial bearing model used in most electric bicycle hubs. This bearing has dimensions of 12mm inner diameter, 24mm outer diameter, and 6mm thickness. Its size design allows it to maintain low friction and high efficiency during high-speed rotation.
The 6901 bearing is a key component widely used in various industries. From the automotive industry to household appliances and the electric bicycle sector, this bearing plays an indispensable role in many critical devices. Its high-speed operation, durability, and reliability make it the preferred choice in these industries.
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